I reckon you'll find that the C12 rack, along with the C15s etc, is a far bit lighter than the A7 item and made of smaller dia tubing. Not a problem if you can weld though.I usually scan Ebay for something old and non-chromed and adapt that. At least that way you can get it horizontal and fitting close up to the seat.

Hi, new to this board, I have just obtained a box of bits ,can any one tell me what I have?frame ; BC11S 836 and engine ; BC11G 3117.I am sorting thro the boxes to see what I have and dont have, with the view to restore back to running. Thanks

I have a parts book for the c12 and it shows quite a nice rear rack, which I would like to locate and put on. Having done an eBay and google search I haven’t been able to find one, but I have seen one fir an A7. As many parts were used over the range, what are the chances that it’s either the same type and it will fit? Has anyone else got a rack on their c12?

It's a great piece of work that but if you can't make one [I admit it's out of my league] just buy the Indian one [it's for a vespa ??!!]. It isn't as pretty [or as satisfying] but it does the job OK and only costs £15. Just needs one hole drilling and one stud threading

If you stay with 6v then I would use thicker wire all over - most of the problems of 6v are down to volt drop + I would add an extra earth from the headlamp shell direct to the battery earth point. TBH unless you intend to do a lot of night riding I can't see much point in upgrading to 12v. You can fit a modern 6v regulator rectifier unit if you want to cut the switch connections/loops down/simplify the whole thing. Making the loom up would only take an afternoon so why not ?